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Old 23rd October 2012, 08:33 AM   #1211
PJotr25 is offline PJotr25  Poland
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exa065: is it possible to share source of DSD loTech Player?
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Old 23rd October 2012, 04:36 PM   #1212
avian is offline avian  Australia
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Quote:
Originally Posted by exa065 View Post
I continue to believe that the top solution is asynchronous USB to I2S, nor asynchronous I2S to I2S.
Oh I agree, and I'm not sure how much interest there are from others, but I'm extremely interested in the new board.

This is probably the most stupid question you will get any time soon, as I have no idea how fpga stuff works or anything involved in how you design/build the exa.... But how flexible is the output pin configuration, and can it be made to be switched around using software on the fly?

I only ask, as right now obviously a few wires need to be switched around when changing from PCM to DSD and vice versa, when used with an ESS Sabre chip. Obviously isnt that big a deal when using something like TPA's OTTO. But is this the sort of thing that could be taken care of in a future exa design? as in programmed directly into the fpga? Or is it just impossible or too messy?
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Old 23rd October 2012, 04:40 PM   #1213
DUC985 is offline DUC985  Germany
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@exa065

i was not aware that there is support existing. I can also try that one.
Which version of OSX and Audirvana are you running whithout issues ?

I have the issues with 10.8.2 driver 1.6.0a4 and all of the latest Audirvana versions.

I'm happy to downgrade to Snow Leopard if this would fix the problems i do not need all this icrap on a music server ...
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Old 23rd October 2012, 06:04 PM   #1214
exa065 is offline exa065  Canada
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Quote:
Originally Posted by PJotr25 View Post
exa065: is it possible to share source of DSD loTech Player?
Pjotr,

The LOTech player uses commercial libraries, and we will be violating the license agreements if we open the source code. Perhaps Flemming can open the source code for his DSD player. He gave it to us, to illustrate his idea, and that's how DSD for exaU2I was born. I don't feel comfortable to release his code.
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Old 23rd October 2012, 06:14 PM   #1215
exa065 is offline exa065  Canada
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Quote:
Originally Posted by avian View Post
Oh I agree, and I'm not sure how much interest there are from others, but I'm extremely interested in the new board.

...can it be made to be switched around using software on the fly?

I only ask, as right now obviously a few wires need to be switched around when changing from PCM to DSD and vice versa, when used with an ESS Sabre chip. Obviously isnt that big a deal when using something like TPA's OTTO. But is this the sort of thing that could be taken care of in a future exa design?
Here is the way we have it designed for now: On the PCB there will be 13 control pins - one for each sample rate, including DSD sampling rates, one for power and one for the FIFO status. By reading these pins, you will know the mode of operation - PCM or DSD and the sampling rate. You will also know when the FIFO is ready to un-mute the DAC.

Is this OK with you? Do you need any additional signals?
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Old 23rd October 2012, 06:32 PM   #1216
sureshm is offline sureshm  Australia
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Hi exa065,

How do we identify if the unit we have has the upgraded clocks? When was this introduced?

Thanks

Quote:
Originally Posted by exa065 View Post
We provided several free upgrades for the exaU2I at no charge:
  • 384 kHz sampling rate was a free software upgrade
  • dsd64/dsd128/dsd256/dsd512 was a free software upgrade
  • OSX drivers
  • We released a second generation ASIO drives and the Dashboard
  • We also upgraded the clocks with 1ps crystals without changing the price
  • The devices with upgraded clocks have a new firmware with lower jitter
At this time we are discussing a new device, not an upgrade.

Regards,

exa065
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Old 23rd October 2012, 06:36 PM   #1217
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Quote:
Originally Posted by exa065 View Post
Pjotr,

The LOTech player uses commercial libraries, and we will be violating the license agreements if we open the source code. Perhaps Flemming can open the source code for his DSD player. He gave it to us, to illustrate his idea, and that's how DSD for exaU2I was born. I don't feel comfortable to release his code.
Hi George
You are welcome to share my code.
But remember is was only a 'proof of concept'.
And the ASIO SDK parts has to be downloaded direct from Steinberger.

Flemming
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Old 23rd October 2012, 06:42 PM   #1218
exa065 is offline exa065  Canada
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Quote:
Originally Posted by sureshm View Post
Hi exa065,

How do we identify if the unit we have has the upgraded clocks? When was this introduced?

Thanks
Here is the clocks upgrade post on this thread:

exaU2I - Multi-Channel Asynchronous USB to I2S Interface

If you have a black plastic clock, it is the old revision. If you have two shiny metal clocks, it is the new one. All devices shipped after 23rd February 2012 have the new 1ps clocks.
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Old 23rd October 2012, 06:47 PM   #1219
exa065 is offline exa065  Canada
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Quote:
Originally Posted by flemming3520 View Post
Hi George
You are welcome to share my code.
But remember is was only a 'proof of concept'.
And the ASIO SDK parts has to be downloaded direct from Steinberger.

Flemming
Hi Flemming, it is good to hear from you. Thank you for reminding us about the ASIO licensing rules. I will find the zip that you've sent me and I will send it to Pjotr.

Your proof of consent is actually bullet-proof.

Best,

exa065
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Old 23rd October 2012, 06:52 PM   #1220
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Quote:
Originally Posted by exa065 View Post
We have a long list of requests for features, and they are interconnected. For example the exaU2I hardware was not designed for DSD. DSD was enabled with a software hack, and this puts limits to what can be done with a player or driver update. There is no hardware signal to switch the DAC between DSD and PCM modes.

Linux drivers are important, but if the hardware needs an update, the driver development has to wait.

I've been thinking about updates and new features for the exaU2I that can take the sound quality to the next level. We've been working also on the numerous requests to make the next generation device more open to tweaking and DIY experiments.
  • Just about 1ps jitter
  • Two sets of clocks for synchronous and asynchronous operation with ES9018
  • 8 channel DSD
  • 8 channel DXD / 384 kHz PCM
  • Individual LEDs for all PCM and DSD sampling rates
  • Easy elimination of USB power
  • Macro USB connector
  • Header for connecting external USB connector
  • Connectors for external power sources
  • New ground isolation technology
  • Micro BNC output connectors
  • Elimination of the USB daughter board
Am I missing something on the hardware side?

Regards,

exa065
Volumen control : One or two I2C outputs
The driver supports multiple boards : Do you need to synchronize the clock in the boards.

What I am looking for is a system with two 'black box' dacs connected direct to my power amps, where all the control and display are in the pc, and I only have one usb cable to each dac.

Flemming
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